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gmatblast
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Of the 120 fliers, how many made stopovers in both Chicago 11 Sep 2004, 08:30
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Of the 120 fliers, how many made stopovers in both Chicago and St. Louise?

(1) 87 fliers made stopovers in Chicago
(2) 96 fliers made stopovers in St. Louis

Please explain



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crackgmat3
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Of the 120 fliers, how many made stopovers in both Chicago 11 Sep 2004, 08:41
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E.

Questions is asking for the fliers which made stop overs in both chicago and st Louis. All the 87 might have made a stop in St. Louis. SO, the given information is not enough.
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Alex_NL
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Of the 120 fliers, how many made stopovers in both Chicago 11 Sep 2004, 09:05
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I would say E but with an different interpretation.

If all the 120 fliers stopped at least at on place, I think the total of fliers that stopped at both cities is 63.
87 + 96 - 63 = 120

But we do not know if all the 120 fliers stopped at least in on place, so we cannot know how many did stop.

Please correct me if I am wrong.

Regards,

Alex
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gmatblast
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Of the 120 fliers, how many made stopovers in both Chicago 11 Sep 2004, 09:18
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Alex_NL
I would say E but with an different interpretation.

If all the 120 fliers stopped at least at on place, I think the total of fliers that stopped at both cities is 63.
87 + 96 - 63 = 120

But we do not know if all the 120 fliers stopped at least in on place, so we cannot know how many did stop.

Please correct me if I am wrong.

Regards,

Alex
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I applied the same logic and came up with E as answer. But the OA is C, which i think is obviously wrong. The question is from peterson's guide.
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Paul
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Of the 120 fliers, how many made stopovers in both Chicago 11 Sep 2004, 10:30
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It is not possible to know without knowing the number of planes which did not make ANY stopover at all
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Alex_NL
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Of the 120 fliers, how many made stopovers in both Chicago 11 Sep 2004, 12:31
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Gmatblast,

Can you tell us the explanation from Peterson.
Maybe we overlook something or maybe we get the right point.

Regards,

Alex
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gmatblast
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Of the 120 fliers, how many made stopovers in both Chicago 12 Sep 2004, 07:35
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Alex_NL
Gmatblast,

Can you tell us the explanation from Peterson.
Maybe we overlook something or maybe we get the right point.

Regards,

Alex
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I do not think we overlooked anything here. Peterson, in its explanation, simply assumes that ALL the fiers made stopover in either Chicago or St. Louis



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Hi there,
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